Question: What position did Idi Amin hold starting on July 28, 1975?
Paraphrase: Which position was did Idi Amin hold starting on July 28, 1975?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q48231 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1975')) }